Anti-fouling paint



FIPEBOI l i l PATENT OFFICE.

MAX EMIL DEJONGE, OF STAPLETON, NEW

YORK.

ANTI-FOU LING PAl NT.

SPECIFICATION forming part of Letters Patent No. 441,290, dated November 25, 1890.

Application filed October 10,1889. Serial No- 326,575. (No specimens.)

To all whom it may concern.-

Be it known that I, MAX EMIL DEJONGE, a citizen of the United States of America, residing at Stapleton, Staten Island, county of Richmond, and State of New York, have invented and discovered a new and useful Comthe atmosphere,

position or Paint for Use upon Metal and Vood; and I do hereby declare that the following is a full, clear, and exact description and specification of the same.

I am aware that other anti-fouling paints and compounds have been made and used previous to my present invention; but I am not aware that any such compound as hereinafter described and claimed by me as my invention has ex'er, previous to my discovery thereof, been known or used.

My invention relates to a compound for preserving the surfaces of wood, metal, and like materials from the corrosive action of gases, or fluids, and also attacks of insects, espeproduce barnacles upon Metalfrom the injurious cially those which ships bottoms. I call my invention lic Anti-Fouling Composition.

My invention consists in the compound composed of certain elements, fully set forth in and claimed at the end of this schedule.

In order that persons skilled in the art may understand, compound, and use my invention, I will proceed to disclose it.

My metallic compound or paint consists of finely-divided zinc suspended in vehicle composed of colophony, shellac, and fusel-oil, by means of which it is spread upon and caused to adhere to the surfaces of the metal or wood.

I mix the zinc-dust aforesaid with the solution of varnish in about the'proportion of one part zinc-dust to two parts of the solution of varnish and stir them well together and apply the resultant compound with a brush in the ordinary manner. This compound hardens under water, so that a ship coated with it can be launched as soon as wanted. In painting wood with this paint I do not need to prepare the surface of the would beforehand; but in painting metals I first clean and dry the surface and put on it a priming of anti-corrosive compound, and when this priming has dried firmly I then paint over this priming with my compound of zinc-dust mixed, as before described, with a solution of rosin varnish and shellac in about the proportions above named.

In placing my compound upon the market for sale I pack the zinc-dust in cases separate from the rosin and shellac varnish. In other words, I put up the varnish in one can and the zinc-dust in another and assemble and mix them together for use as required. This is done because the paint vehicle of colophony, shellac, and tusel-oil when mixed with zinc-dust produces explosive gases. A chemical action takes place which is advantageous in applying the compound to metal and wood, but which renders it dangerous to assemble the separate constituents in sealed vessels.

This compound may be mixed and put in cans ready for use by puncturing the cans to allow the gases to escape; but I prefer to market the compound in separate cans, as specified above.

I have found intesting my metallic antifouling compound on ships bottoms that it absolutely prevents fouling.

I propose to use my compound for other purposes than those enumerated herein, which it is not necessary to mention here.

Having now fully described my invention and the manner in which I have embodied it, what I claim as new, anddesire to secure by Letters Patent, is-- An anti-fouling paint composed of zincdust suspended in a vehicle of a solution of 85 colophony and shellac in fusel-oil, substan-, tially as set forth.

MAX EMIL DEJONGE.

Witnesses:

JAMES M. HICKS, W. L. BENNEM. 

